U.K. stocks underperformed the broader European markets again on Thursday, put under pressure by another strong rally in the pound. Sterling was rising on further signs of a breakthrough in the Brexit negotiations. What are markets are doing: The FTSE 100 index UKX, -0.27% fell 0.3% to 7,371.42, building on a 0.9% loss from Wednesday and trading at around a two-month low. For November, the U.K. benchmark was on track for a 1.7% loss, which would be the biggest monthly drop since June.